9746882f54
Create a new header file, kmap.h, that groups all the definitions and functions associated with the io mapping and remapping. Currently the functions are spread across raw_io.h and io_mm.h. And in the future we will want to use these in io_no.h as well. So it makes sense to move them all together into a single header file. It is named after the arch/m68k/mm/kmap.c file that actually implements many of the exported functions. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Tested-by: Angelo Dureghello <angelo@sysam.it>
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _M68KNOMMU_IO_H
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#define _M68KNOMMU_IO_H
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/*
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* The non-MMU m68k and ColdFire IO and memory mapped hardware access
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* functions have always worked in CPU native endian. We need to define
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* that behavior here first before we include asm-generic/io.h.
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*/
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#define __raw_readb(addr) \
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({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })
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#define __raw_readw(addr) \
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({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
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#define __raw_readl(addr) \
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({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })
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#define __raw_writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b))
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#define __raw_writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b))
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#define __raw_writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))
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#define readb __raw_readb
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#define readw __raw_readw
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#define readl __raw_readl
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#define writeb __raw_writeb
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#define writew __raw_writew
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#define writel __raw_writel
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/*
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* These are defined in kmap.h as static inline functions. To maintain
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* previous behavior we put these define guards here so io_mm.h doesn't
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* see them.
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*/
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#ifdef CONFIG_MMU
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#define memset_io memset_io
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#define memcpy_fromio memcpy_fromio
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#define memcpy_toio memcpy_toio
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#endif
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#include <asm/kmap.h>
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#include <asm/virtconvert.h>
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#include <asm-generic/io.h>
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#endif /* _M68KNOMMU_IO_H */
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